JPH039641A - Cordless telephone system - Google Patents

Abstract

PURPOSE:To realize hand-free speech by providing a voice amplification degree switching means and a loudspeaker button to start up the voice amplification degree switching means on a mobile station, and providing a speaker, a speaker amplifier circuit, and a received signal switching means on a base station. CONSTITUTION:When the loudspeaker button 27 is depressed during call, the control means 14 of the mobile station B starts up the voice amplification degree switching means 28, and increases the gain of a transmission amplifier circuit 21, and also, turns off the power source of a receiving amplifier circuit 18, which interrupts the voice of an opposite party from a receiver 23 and enables the voice of a principal to be amplified. At the base station A, the voice from the mobile station B is received with a receiving antenna 10, and a received signal switching means 11 is started up with a control means 2, and the input of a received signal is switched to the speaker amplifier circuit 12, and the voice of the opposite party can be heard from the speaker 13. Thereby, loudspeaker speech can be performed, and the hand-free speech can be realized in a long conversation.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cordless telephone device that uses weak radio waves or uses low power.

(Prior Art) Cordless telephone devices are divided into base stations and mobile stations.
Telephone calls are realized by transmitting and receiving radio signals between two parties, and a mobile station is generally equipped with a transmitter and a receiver and can move while making a single call.

FIG. 3 shows a schematic configuration of a conventional cordless telephone device, with FIG. 3(A) showing a base station and FIG. 3(B) showing a mobile station. In FIG. 3, reference numeral 1 denotes a telephone communication circuit, which has a receive signal output terminal 1a and a transmit signal input terminal 1b. 2 is a control means, 3 is a transmission data generation means, 4 is a radio frequency (hereinafter referred to as RF) transmission circuit, 5 is an RF reception circuit, 6 is a reception data decoding means, 7 is a radio wave presence determination circuit, and 8 is an incoming call detection means. , 9 is a transmitting antenna, 10 is a receiving antenna, 14 is a control means, 15 is an RF receiving circuit, 6 is a radio wave presence determination circuit, 17 is a received data decoding means, 18 is a receiving amplifier circuit, 19 is a transmitting data generating means, 20 is RF
A transmitting circuit, 21 a transmitting amplifier circuit, 22 a transmitter, 23 a receiver, 24 a receiving antenna, 25 a transmitting antenna, 2
6 is a call button.

Next, the operation of the above-mentioned conventional example will be explained using an example when a mobile station makes a call. In FIG. 3, when the call button 26 of the mobile station is pressed during standby, the control means 14 detects the input of the call button 26, and the reception antenna 24. After passing through the RF receiving circuit 15 and confirming in the radio wave presence/absence determining circuit 16 that the receiving channel is vacant.

Connection request data is generated by the transmission data generation means 19, and R
The data is modulated by the F transmitting circuit 20 and transmitted from the transmitting antenna 25. This data is sent to the base station using the receiving antenna 10.
The received data is received by the RF receiving circuit 5 and then sent to the received data decoding means 6.
After decoding the connection request data, the radio wave presence/absence determination circuit 7 determines that the channel to be used is vacant, and then the transmission data generation means 3 generates ACK data indicating preparation completion for the connection request data. and the generated data to R
The signal is modulated by the F transmitting circuit 4 and transmitted from the transmitting antenna 9 to enter a talking state. In the call state, the mobile station uses handset 2.
2, the user can hear the other party's voice using the receiver 23, and can move while talking.

However, in the conventional cordless telephone device shown in FIG. 3 above, the mobile station includes a transmitting circuit, a receiving circuit, a transmitter, a receiver,
It required a built-in battery and was heavier than a normal telephone handset, making it inconvenient for long-term phone calls.

As a way to solve this problem, Japanese Patent Application Laid-Open No. 63-1878
As described in Japanese Patent No. 43, there is a cordless telephone device in which a mobile station is equipped with only a battery, a transmitter, and a receiver, and a base station is equipped with a speaker amplifier circuit and a speaker.

FIG. 4 shows a schematic configuration of the cordless telephone device described in the above-mentioned Japanese Patent Application Laid-open No. 63-1137843, and FIG. 4(A) shows the configuration of the base station, and FIG. 4(B) shows the configuration of the base station. The configuration of the mobile station is shown. In FIG. 4, 41 is a communication circuit, 42 is a control means, 43 is a radio wave presence determination circuit, 44 is an RF receiving circuit, and 45 is a speaker amplifier circuit.

46 is a speaker, 47 is an incoming call detection means, 48 is an incoming call notification means, 49 is a receiving antenna, 50 is a control means, 51 is R
F receiving circuit, 52 a transmitting amplifier circuit, 53 a transmitter, 54
is a call button, and 55 is a transmitting antenna.

Next, the operation shown in FIG. 4 will be explained. In FIG. 4, when the mobile station's call button 54 is pressed during standby,
The input of the call button 54 is detected by the control means 50, and the RF
Turn on the power of the transmitting circuit 51 and send radio waves to the transmitting antenna 55
Send from On the other hand, at the base station, the receiving antenna 49. When the presence of radio waves is determined by the radio wave presence/absence determination circuit 43 via the RF receiving circuit 44, the 1-communication circuit 41 activates the speaker amplifier circuit 45 to enter a line communication state, and the voice of the other station can be heard from the speaker 46. Furthermore, the mobile station can input its own voice through the mobile station's transmitter 53.

(Problems to be Solved by the Invention) However, the above-mentioned conventional cordless telephone device has the following problems.

(1) The conventional example shown in FIG. 3 is heavy and inconvenient to use because the mobile station includes a transmitter circuit, a receiver circuit, a transmitter, a receiver, a battery, etc.

(2) In the conventional example shown in Fig. 4, in the case of a cordless telephone used in Japan, both the base station and the mobile station confirm that the frequency to be used is not used by others before communicating. This is because data that includes an identification code (ID code) is transmitted during a communication connection, and verification of the identification code is required by law.

Since the transmitting/receiving circuit and the transmitting data generating means are essential components for both stations, there is a problem in the feasibility of the cordless telephone device shown in FIG. 4. Furthermore, in the device shown in FIG. 4, the other party's voice can always be heard only from the base station speaker, so the confidentiality of the call cannot be maintained.

The present invention solves these conventional problems,
The object of the present invention is to provide a cordless telephone device that can transmit and receive calls at a mobile station and can also be used as a loudspeaker telephone by pressing a button on the mobile station.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a mobile station with an audio amplification switching means and a loudspeaker button for activating the audio amplification switching means, and also provides a base station with a speaker. and a speaker amplification circuit, and when the data transmitted when the mobile station's loudspeaker button is pressed is received, the speaker is activated and the received signal is input to the speaker amplification circuit, so as not to be input to the RF transmission circuit. The receiver is equipped with a receive signal switching means.

(Function) Therefore, according to the present invention, when the amplification button of the mobile station is pressed during a call, the reception amplification circuit of the mobile station is turned off.
F. The gain of the transmitting amplification circuit increases, and at the same time the base station's speaker amplification circuit starts up and the other party's voice can be heard from the base station's speaker, making it difficult to use the mobile station while talking on the mobile station. When multiple people in the vicinity want to talk to the other party, it is possible to realize a loudspeaker call, a so-called speakerphone call.

(Embodiment) FIG. 1 shows the configuration of an embodiment of the present invention, with FIG. 1(A) showing the configuration of a base station, and FIG. 1(B) showing the configuration of a mobile station. . 1 to 10 and 1 in Figure 1
4 to 26 are the same as the corresponding numbers in the conventional example shown in FIG. 11 is a reception signal switching means, 12 is a speaker amplification circuit, 13 is a speaker, 27 is a loudspeaker button, 28
is an audio amplification degree switching means.

FIG. 2 is a flow chart of the embodiment of FIG.

Next, an explanation will be given of the operation when switching from a telephone call using the handset of the mobile station to a loudspeaker telephone call in the above embodiment. In the above embodiment, when the loudspeaker button 27 is pressed during a call on the handset (FIG. 2, 82), the control means 14 of the mobile station detects the pressing of the loudspeaker button 27 and activates the audio amplification switching means 28. , the gain of the transmitting amplifier circuit 21 is increased and the power of the receiving amplifier circuit 18 is turned off to prevent the other party's voice from being heard from the receiver 23, and to make it possible to hear your own voice even when you are away from the transmitter 22. Make it amplified.

(Fig. 2 SS). Next, the transmission data generation means 19 generates "public address call request data", and the RF transmission circuit 20
At the base station, the data is received by the receiving antenna 10, passed through the RF receiving circuit 5, and then transmitted to the base station from the transmitting antenna 25 (S, in FIG. 2). When the "public address call request data" is decoded in step 6, the control means 2 causes the receiving signal switching means 1 to
1, switches the reception signal input from the reception signal output terminal 1a of the communication circuit 1 from the RF transmission circuit 4 to the speaker amplification circuit 12, and starts the speaker amplifier circuit 12 to output the other party's voice from the speaker. Be able to hear (Part 2)
Figure 87).

In this way, according to the above-described embodiment, a loudspeaker call can be made by operating one button on the mobile station during a call using the handset of the mobile station.

(Effects of the Invention) As is clear from the above examples, the present invention has the following effects.

(1) While talking on the mobile station's handset, you can make a loudspeaker call by pressing a button on the mobile station, making it convenient for users to take their hands off the mobile station when using the phone for long calls. You can make free calls.

(2) Since the distance between the base station speaker and the mobile station's transmitter is greater than that of a general public address telephone, hands-free operation is possible without the need for an audio switch circuit, except for bringing the mobile station closer to the base station. Can make phone calls.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of a cordless telephone device according to an embodiment of the present invention, and FIG. 2 is a flowchart for switching from a telephone call using a handset of a mobile station to a loudspeaker telephone call according to the present invention.
FIG. 3 is a schematic block diagram of a cordless telephone device according to one conventional embodiment, and FIG. 4 is a schematic block diagram of a cordless telephone device with a loudspeaker function according to another conventional embodiment. 1.41... Call circuit, 1a... Receiving signal output terminal, 1b... Sending signal input terminal, 2゜14, 4
2.50... Control means, 3,19... Transmission data generation means, 4, 20.51... RF transmission circuit,
5, 15, 44...RF receiving circuit, 6゜17...
Means for decoding received data? , 16.43...Radio wave presence/absence determination circuit, 8,47...Incoming call detection means, 9,
25.55...Transmission antenna, 10°24.49...
- Receiving antenna, 11... Receive signal switching means, 1
2.45...Speaker amplifier circuit. 13, 46... Speaker, 18... Receiving amplifier circuit,
21, 52... Sending amplification circuit, 22.53...
Transmitter, 23... Receiver, 26.54... Call button, 27... Loudspeaker button, 28... Audio amplification degree switching means, 48... Incoming call notification means.

Claims (1)

[Claims] In a cordless telephone device comprising a base station connected to a telephone line and a mobile station wirelessly connected to the base station, the mobile station includes a transmitter, a handset, a transmitting amplifying circuit, a receiving amplifying circuit, and the like. , a radio frequency (RF) transmission circuit, an RF reception circuit, a transmission data generation means, a reception data decoding means, an audio amplification degree switching means, and a loudspeaker button for activating the audio amplification degree switching means, and The base station includes a telephone communication circuit, an RF transmitting circuit, an RF receiving circuit, a transmitted data generating means, a received data decoding means, a speaker amplification circuit, a speaker, and a received data decoding means. When decoded as data generated by the transmission data generation means of the mobile station when is pressed,
1. A cordless telephone device comprising: receiving signal switching means for activating the speaker amplifier circuit.